I am trying to detect when a feature has been copied and pasted. The OnCreateFeature event fires, but I cannot tell if the feature object was copy/pasted. Is there an event or other method to differentiate pasted features from newly created features?

EDIT: Two possible approaches I've thought of, but not sure of efficacy or downsides.

  1. In the OnCreateFeature event, I can read the 'new' feature's attributes, and compare them to the DefaultValue of each field. If every value is default, it's probably a new feature and not a copied feature.
  2. Get the geometry of the 'new' feature, and compare it to the geometry of every selected feature. If there is a match, the feature is a copy/paste.
  • 2
    Did you try using ICustomizationFilter to trap when the paste command is invoked ? gis.stackexchange.com/a/8152/59 – Kirk Kuykendall Nov 9 '18 at 14:00
  • @KirkKuykendall That's perfect! Post an answer and I'll accept. I'm posting my solution for the sake of posterity. – Barbarossa Nov 9 '18 at 16:26

Going off help provided by Kirk Kuykendall, I came up with the following solution. I wanted to post it here as a c# alternative to this post. It assumes you are already listening for OnStartEditing and OnStopEditing events.

namespace MyAddin {
    public class MyExtensionClass : ESRI.ArcGIS.Desktop.AddIns.Extension {
        private ICustomizationFilter _filter;

        // Constructors and methods to listen for edit events here

        private void OnStartEditing() {
            _filter = new myCustomizationFilter();
            ArcMap.Application.LockCustomization("password", _filter);
        private void OnStopEditing(bool save) {

    public class myCustomizationFilter : ESRI.ArcGIS.Framework.ICustomizationFilter {
        public bool OnCustomizationEvent(esriCustomizationEvent custEventType, object eventCtx) {
            if (custEventType == esriCustomizationEvent.esriCEInvokeCommand) {
                ICommandItem cmd = eventCtx as ICommandItem;
                if (cmd.Name == "Edit_Paste") {
                    // do something here
                } else if (cmd.Name == "Edit_Copy") {
                    // do something else here
                } else if (cmd.Name == "Edit_Cut") {
                    // do something else here
            return false;

All menu, toolbar, and command names and GUIDs can be found here, as well as techniques for finding references to specific command items.

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